to stamp (with a signet or private mark) for security or preservation (literally or figuratively); by implication to keep secret to attest

1. to set a seal upon, mark with a seal, to seal

a. for security: from Satan

b. since things sealed up are concealed (as the contents of a letter), to hide, keep in silence, keep secret

c. in order to mark a person or a thing

1. to set a mark upon by the impress of a seal or a stamp

2. angels are said to be sealed by God

d. in order to prove, confirm, or attest a thing

1. to confirm authenticate, place beyond doubt 1d

e. of a written document 1d

f. to prove one's testimony to a person that he is what he professes to be